Wired is more stable ,and secured then wirelless most routers now are both ,so you can use either or. If you are running Vista make sure it has a windows logo on the box for better compability with the router.
As for the best it all varies I use the dlink 625 which is both wired ,and wireless. If you plainning on use the wireless make sure the router can broadacast the wireless network though out the house the boxes should say how many feet it broadacasts.
If you have a big house ,or going use though floors like router in the basement you might want to look at a sepearte attennna to boost the signal.
If you are using dsl though make sure your modem isn't a brouter modem+router it might be able to do wireless already ,so double check.
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